1 Inch Furnace Filters

Breathe Easy with United Filter's Unbeatable Selection of 1-Inch Furnace Filters

Looking for the best 1-inch furnace filters in North America without breaking the bank? United Filter stocks a massive selection of 1 inch furnace filters in various sizes to perfectly fit your HVAC system. 

Our furnace filters are available at the lowest prices in Canada and USA. We guarantee you won’t find lower prices on 1 inch furnace filters on Amazon. Their prices can fluctuate. 

We prioritize providing superior quality household air filters at the lowest prices guaranteed. Skip shopping around for furnace filters and breathe confidently with United Filter.

A Perfect Fit, a Perfect Furnace Filter: Finding the Perfect Size is Paramount!

Most 1-inch furnace filters are typically in standard dimensions like 16x20x1 or 20x25x1. However, based on our experience selling 1-inch furnace filters, we recommend that you confirm the size of your existing furnace filter before ordering. 

For your furnace to operate at maximum efficiency, at the lowest cost, and maintain optimal indoor air quality, it’s super important you double-check the correct filter size before ordering. 

How do you find your furnace filter size? You’ll need the length, width, and depth in inches, and It’s easy to find! Just locate the existing filter in your furnace and measure its length, width, and depth. 

When your new 1 inch furnace filter arrives, make sure it fits snugly into the filter rack. If a 1 inch furnace filter fits too tight or too loose, it will not be as effective. Follow these simple steps to get the right furnace filter for your system and improve your home's indoor air quality.

Breathe Easy with United Filter's Unbeatable Selection of 1-Inch Furnace Filters

Looking for the best 1-inch furnace filters in North America without breaking the bank? United Filter stocks a massive selection of 1 inch furnace filters in various sizes to perfectly fit your HVAC system. 

Our furnace filters are available at the lowest prices in Canada and USA. We guarantee you won’t find lower prices on 1 inch furnace filters on Amazon. Their prices can fluctuate. 

We prioritize providing superior quality household air filters at the lowest prices guaranteed. Skip shopping around for furnace filters and breathe confidently with United Filter.

A Perfect Fit, a Perfect Furnace Filter: Finding the Perfect Size is Paramount!

Most 1-inch furnace filters are typically in standard dimensions like 16x20x1 or 20x25x1. However, based on our experience selling 1-inch furnace filters, we recommend that you confirm the size of your existing furnace filter before ordering. 

For your furnace to operate at maximum efficiency, at the lowest cost, and maintain optimal indoor air quality, it’s super important you double-check the correct filter size before ordering. 

How do you find your furnace filter size? You’ll need the length, width, and depth in inches, and It’s easy to find! Just locate the existing filter in your furnace and measure its length, width, and depth. 

When your new 1 inch furnace filter arrives, make sure it fits snugly into the filter rack. If a 1 inch furnace filter fits too tight or too loose, it will not be as effective. Follow these simple steps to get the right furnace filter for your system and improve your home's indoor air quality.

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20x25x1 MERV 8 - Case of 12
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1 Inch Furnace Filters

20x25x1 MERV 8 - Case of 12 20x25x1 MERV 8 - Case of 12

Nominal Size: 20 x 25 x 1
Actual Size: 19-1/2 x 24-1/2 x 3/4
Part #: UF8-12025-12
MERV: 8
Case: 12
Case: $89.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$65.00
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20x25x1 MERV 11 Furnace Filter
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1 Inch Furnace Filters

20x25x1 MERV 11 Furnace Filter 20x25x1 MERV 11 Furnace Filter

Nominal Size: 20x25x1
Actual Size: 19-1/2 x 24-1/2 x 3/4
Part #: UF11-12025-12
MERV: 11
Case: 12
Price: $104.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$76.00
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20x25x1 MERV 13
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1 Inch Furnace Filters

20x25x1 MERV 13 20x25x1 MERV 13

Nominal Size: 20 x 25 x 1
Actual Size: 19-1/2 x 24-1/2 x 3/4
Part #: UF13-12025-12
MERV: 13
Case: 12
Price $134.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$97.00
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20x30x1 MERV 8 - 12 Pack
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1 Inch Furnace Filters

20x30x1 MERV 8 - 12 Pack 20x30x1 MERV 8 - 12 Pack

Nominal Size: 20 x 30 x 1
Actual Size: 19-1/2 x 29-1/2 x 3/4
Part #: UF8-12030-12
MERV: 8
Case: 12
Price: $139.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$95.00
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20x30x1 MERV 11 - 12 Pack
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1 Inch Furnace Filters

20x30x1 MERV 11 - 12 Pack 20x30x1 MERV 11 - 12 Pack

Nominal Size: 20 x 30 x 1
Actual Size: 19-1/2 x 29-1/2 x 3/4
Part #: UF11-12030-12
MERV: 11
Case: 12
Price: $129.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$94.00
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20x30x1 MERV 13 - 12 Pack
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1 Inch Furnace Filters

20x30x1 MERV 13 - 12 Pack 20x30x1 MERV 13 - 12 Pack

Nominal Size: 20 x 30 x 1
Actual Size: 19-1/2 x 29-1/2 x 3/4
Part #: UF13-12030-12
MERV: 13
Case: 12
Price: $179.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$129.00
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22x22x1 MERV 8 - 12 Pack
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1 Inch Furnace Filters

22x22x1 MERV 8 - 12 Pack 22x22x1 MERV 8 - 12 Pack

Nominal Size: 22 x 22 x 1
Actual Size: 21-1/2 x 21-1/2 x 3/4
Part #: UF8-12222-12
MERV: 8
Case: 12
Price: $109.99

Manufactured: North America

*Effective for dust, pollen, pet dander, bacteria and mould.
$79.00
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22x22x1 MERV 11 - 12 Pack
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1 Inch Furnace Filters

22x22x1 MERV 11 - 12 Pack 22x22x1 MERV 11 - 12 Pack

Nominal Size: 22 x 22 x 1
Actual Size: 21-1/2 x 21-1/2 x 3/4
Part #: UF11-12222-12
MERV: 11
Case: 12
Price: $119.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$86.00
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22x22x1 MERV 13 - 12 Pack
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1 Inch Furnace Filters

22x22x1 MERV 13 - 12 Pack 22x22x1 MERV 13 - 12 Pack

Nominal Size: 22 x 22 x 1
Actual Size: 21-1/2 x 21-1/2 x 3/4
Part #: UF13-12222-12
MERV: 13
Case: 12
Price: $179.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$129.00
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24x24x1 MERV 8 - 12 Pack
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1 Inch Furnace Filters

24x24x1 MERV 8 - 12 Pack 24x24x1 MERV 8 - 12 Pack

Nominal Size: 24 x 24 x 1
Actual Size: 23-1/2 x 23-1/2 x 3/4
Part #: UF8-12424-12
MERV: 8
Case: 12
Price: $99.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$72.00
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24x24x1 Furnace Filter MERV 11 - 12 Pack
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1 Inch Furnace Filters

24x24x1 Furnace Filter MERV 11 - 12 Pack 24x24x1 Furnace Filter MERV 11 - 12 Pack

Nominal Size: 24x24x1
Actual Size: 23-1/2 x 23-1/2 x 3/4
Part #: UF11-12424-12
MERV: 11
Case: 12
Price: $119.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$86.00
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24x24x1 MERV 13 - 12 Pack
View Detail
1 Inch Furnace Filters

24x24x1 MERV 13 - 12 Pack 24x24x1 MERV 13 - 12 Pack

Nominal Size: 24 x 24 x 1
Actual Size: 23-1/2 x 23-1/2 x 3/4
Part #: UF13-12424-12
MERV: 13
Case: 12
Price: $159.99

Manufactured: North America

*Effective for dust, pollen, pet dander, bacteria and mould.
$115.00
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